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US2790050A
Expired / Lapsed
US
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Fluid-blast circuit breaker
Assignee: Metropolitan Vickers Electrical Co Ltd
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Filing: 1954-08-04
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Granted: 1957-04-23
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Expires: 1974-08-04
Abstract
No abstract record available.
Inventors
- 👤 Fawdrey Cecil Arthur
- 👤 Barker John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:21
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/36; H01H1/38; H01H1/385
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |